/Engine/Source/Runtime/MovieScene/Public/EntitySystem/MovieSceneDecompositionQuery.h
Get the value that the channel behind the given entity should have in order for the combined blended values of all known channels to produce the desired current value.
The value that the entity's channel should have to produce the desired current value
double Recompose ( [FMovieSceneEntityID](API\Runtime\MovieScene\EntitySystem\FMovieSceneEntityID) EntityID, double CurrentValue, const double * InitialValue ) const